Campbelltown Council representatives will travel to the area's Japanese sister city in August to celebrate the 35 years of friendship.
Mayor George Brticevic and general manager Lindy Dietz have been invited to visit Koshigaya (namesake of Campbelltown's park) to coincide with the city's Awa-Odori Festival.
Cr Brticevic said the council was very proud of its ongoing relationship with its Japanese counterpart and he was looking forward to visiting the city again.
"It is the experience of a lifetime to see the Japanese culture," he said.
"People in Campbelltown, unless they've visited the city, don't realise how important the sister city relationship is for the Koshigayans, they absolutely love Campbelltown and it's such a competitive provess for their school kids to come here on exchange.
"Our Koshigaya Park is a great park, but their Campbelltown Park is next level - there's a bird sanctuary with Australian birds that was started back in the day."
Cr Brticevic said they would take the trip as an opportunity to visit the J-League (Japan's national soccer league) and other businesses and universities.
He said the sister city relationship was so successful because both council's were dedicated to sharing ideas, networking and supporting one another.
"Previous councils had the view to starting a relationship and it is great that it has continued all these years," Cr Brticevic said.
"I think the support of both councils to see this relationship thrive is why our sister city relationship is so successful where perhaps others across the country haven't been."